Quilt cover

ABSTRACT

A quilt cover which makes difficult the slippage of a quilt in the quilt cover without impairing the lightweight and softness of the quilt cover. 
     The quilt cover has a part composed of cloth “a” containing fibers “A” having a monofilament diameter of 10 to 10,000 nm.

TECHNICAL FIELD

The present invention relates to a quilt cover which makes difficult theslippage of a quilt in the quilt cover.

BACKGROUND ART

As a prior art method of making difficult the slippage of a quilt in aquilt cover, for example, Patent Document 1 proposes a method of fixinga small friction material made of a soft resin or synthetic rubber to aquilt cover or a quilt. However, this method has a disadvantage that thelightweight and softness of the quilt cover or the quilt may beimpaired.

(Patent Document 1) JP-A 2006-349

DISCLOSURE OF THE INVENTION

An object of the present invention which was made in view of the abovesituation is to provide a quilt cover which makes difficult the slippageof a quilt in the quilt cover without impairing the lightweight andsoftness of the quilt cover.

The inventors of the present invention conducted intensive studies toattain the above object and found that a quilt cover which makesdifficult the slippage of a quilt in the quilt cover is obtained byplacing cloth containing fine fibers on a surface in contact with thequilt of the quilt cover without impairing the lightweight and softnessof the quilt cover. The present invention was accomplished by furtherconducting intensive studies.

Thus, according to the present invention, there is provided “a quiltcover having a part composed of cloth “a” containing fibers “A” having amonofilament diameter of 10 to 10,000 nm”.

When the quilt cover is opened, the above part is arranged on the rearsurface of the quilt cover, and the area ratio of the part to the rearsurface is preferably not less than 3%. The area ratio of the above partto the rear surface is more preferably 3 to 40%.

Preferably, the monofilament diameter of the above fibers “A” is 10 to1,000 nm. Preferably, the above part has a width of 5 to 100 cm and alength of 50 to 200 cm.

Preferably, the above part is sewed or bonded to the quilt cover.Preferably, the above part is sewed or bonded to the rear surface on ahuman side and/or the rear surface on an outer side of the quilt cover.Preferably, the above part is sewed or bonded to a position 0 to 50 cmaway from the end of the quilt cover. Preferably, the above part issewed or bonded to a plurality of sites.

Preferably, the above fibers “A” are long fibers, each having not lessthan 500 filaments. Preferably, the above fibers “A” are yarn obtainedby dissolving and removing the sea component of sea-island typecomposite fibers composed of a sea component and an island component.Preferably, the above fibers “A” are made of polyester. Preferably, theabove cloth further contains fibers “B” having a monofilament diameterlarger than 10,000 nm.

Preferably, the cloth “a” is woven, knitted or nonwoven cloth.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 are schematic diagrams showing an example of the quilt cover ofthe present invention wherein the left diagram shows that the quiltcover is opened and the right diagram shows that the quilt cover isclosed;

FIG. 2 is a schematic diagram showing a method of measuring a frictionresistance value; and

FIG. 3 is a diagram of a knit texture used in Example 1.

EXPLANATION OF REFERENCE SYMBOLS

-   1: quilt cover-   2: cloth “a”-   3: cloth “a”-   4: cloth “a”-   5: pulley-   6: head-   7: sample

BEST MODE FOR CARRYING OUT THE INVENTION Cloth “a”

The quilt cover of the present invention has a part composed of cloth“a” containing fibers “A” having a monofilament diameter of 10 to 10,000nm.

(Fibers “A”)

It is important that the above fibers “A” should have a monofilamentdiameter (diameter of a monofilament) of 10 to 10,000 nm (preferably 10to 1,000 nm, more preferably 250 to 800 nm, particularly preferably 510to 800 nm). When the monofilament diameter is smaller than 10 nm, thefiber strength deteriorates disadvantageously. When the monofilamentdiameter is larger than 10,000 nm, a sufficiently high antislippingeffect may not be obtained disadvantageously. When the cross section ofthe monofilament is a modified cross section other than a circular crosssection, the diameter of a circumscribing circle is taken as themonofilament diameter. The monofilament diameter an be measured byphotographing the cross section of a fiber with a transmission electronmicroscope.

When the above fibers “A” are filament yarn (long fibers), the number offilaments is not particularly limited. It is preferably not less than500 (more preferably 2,000 to 50,000) to obtain an excellentantislipping effect. The total fineness of the filament yarn (product ofmonofilament fineness and the number of filaments) is preferably 30 to800 dtex.

The above fibers “A” are not limited to a particular form and may beshort fibers or long fibers (filament yarn). They are preferably longfibers (filament yarn). The cross section of the monofilament is notparticularly limited and may be a known cross section such as acircular, triangular, flat or hollow cross section. The fibers “A” maybe subjected to ordinary air processing or false-twist crimpingprocessing.

The polymer forming the above fibers “A” is not limited to a particulartype but preferably a polyester-based polymer or nylon-based polymer.Preferred examples of the polymer include polyethylene terephthalate,polytrimethylene terephthalate, polybutylene terephthalate, polylacticacid and polyesters comprising a third component. The polyester may be apolyester which is obtained by material recycling or chemical recycling.Further, it may be a polyester obtained by using a catalyst containing aspecific phosphorus compound and a specific titanium compound asdisclosed by JP-A 2004-270097 and JP-A 2004-211268, polylactic acid orstereocomplex polylactic acid. The above polyester polymer may compriseone or more pore forming agents, cationic dye dyeable agents, coloringinhibitors, heat stabilizers, fluorescent brightening agents, mattingagents, coloring agents, hygroscopic agents and inorganic fineparticles.

(fibers “B”)

The cloth “a” contained in the quilt cover of the present invention maybe composed of only the above fibers “A”. However, when it is composedof the above fibers “A” and fibers “B” having a monofilament diameterlarger than 10,000 nm as other fibers, the shape retainability of thecloth “a” improves advantageously.

The above fibers “B” have a monofilament diameter of preferably morethan 10,000 nm (more preferably 10 to 33 μm). “33 μm” is equal to about10 dtex in terms of fineness. When the monofilament diameter of thefibers “B” is smaller than 10,000 nm (10 μm), the shape retainability ofthe cloth “a” may be impaired. When the cross section of themonofilament is a modified cross section other than a circular crosssection, the diameter of a circumscribing circle is taken as themonofilament diameter. The monofilament diameter can be measured byphotographing the cross section of a fiber with a transmission electronmicroscope as described above.

When the above fibers “B” are filament yarn (long fibers), the number offilaments is not particularly limited but preferably 1 to 300. The totalfineness is preferably 10 to 800 dtex.

The above fibers “B” are not limited to a particular form and may bespun yarn. Long fibers (multifilament yarn), polyurethane fibers or bothof them are preferably used. The cross section of the monofilament isnot particularly limited and may be a known cross section such as acircular, triangular, flat or hollow cross section. The fibers “B” maybe subjected to ordinary air processing or false-twist crimpingprocessing. The fibers “B” may be of a single type or a plurality oftypes, for example, fibers B1, fibers B2, fibers B3, etc.

The polymer forming the above fibers “B” is not limited to a particulartype. Preferred examples of the polymer include polyethyleneterephthalate, polytrimethylene terephthalate, polybutyleneterephthalate, polylactic acid, stereocomplex polylactic acid,polyesters comprising a third component, polyether ester and urethane.The polyester may be a polyester which is obtained by material recyclingor chemical recycling. Further, it may be a polyester obtained by usinga catalyst containing a specific phosphorus compound and a specifictitanium compound as disclosed by JP-A 2004-270097 and JP-A 2004-211268,polylactic acid or stereocomplex polylactic acid. To further improve theantislipping effect, an elastic resin such as polyether ester orpolyurethane is preferred. The above polymer forming the above filamentyarn B may comprise one or more pore forming agents, cationic dyedyeable agents, coloring inhibitors, heat stabilizers, fluorescentbrightening agents, matting agents, coloring agents, hygroscopic agentsand inorganic fine particles.

The above fibers “B” may be composite yarn. Preferred examples of thecomposite yarn include composite yarn obtained by air mixing togetherelastic fiber yarn composed of polyurethane fibers or polyetherester-based fibers and polyester-based fiber yarn by means of aninterlace air nozzle, composite yarn obtained by covering elastic fiberyarn with polyester-based yarn and composite yarn composed of spun yarn.

It is preferred that the above fibers “A” should be exposed to eitherone of the front surface and the rear surface of the cloth contained inthe quilt cover of the present invention. For example, friction forcewith a quilt is improved by using the above fibers “A” in contact withthe quilt, thereby obtaining an excellent antislipping effect. It ispreferred that when the area AA of the fibers “A” and the area BA of thefibers “B” are measured in a photograph of the surface of gray clothwith an electron microscope at a magnification of 50, the area ratio (%)of the fibers “A” (=AA/(AA+BA)×100) should be not less than 30%(preferably 100%). It is particularly preferred that only the abovefibers “A” should be exposed to either one of the front surface and therear surface of the above cloth “a”. When the quilt cover is used whilethe surface to which only the fibers “A” are exposed is placed on thequilt side, friction force with the quilt improves, thereby obtaining anantislipping effect.

<Production of Cloth “a”>

The cloth “a” may be produced, for example, by the following productionprocess.

(fibers “A”)

Sea-island type composite fibers (fibers for fibers “A”) composed of asea component and an island component having a diameter of 10 to 10,000nm are first prepared. A sea-island type composite fiber multifilament(100 to 1,500 islands) disclosed by JP-A 2007-2364 are preferably usedas the sea-island type composite fibers.

That is, a polymer which is easily soluble in an alkali aqueous solutionis used as the above sea component polymer. Preferred examples of thepolymer easily soluble in an alkali aqueous solution include polylacticacid, a super high molecular weight polyalkylene oxide condensate-basedpolymer, a polyethylene glycol-based compound copolyester, and acopolyester of a polyethylene glycol-based compound and 5-sodiumsulfonic acid isophthalic acid. Out of these, a polyethyleneterephthalate-based copolyester having an intrinsic viscosity of 0.4 to0.6 obtained by copolymerizing 6 to 12 mol % of 5-sodiumsulfoisophthalic acid and 3 to 10 wt % of polyethylene glycol having amolecular weight of 4,000 to 12,000 is particularly preferred.

Meanwhile, a polyester such as fiber forming polyethylene terephthalate,polytrimethylene terephthalate, polybutylene terephthalate, polylacticacid or a polyester comprising a third component is preferred as theisland component polymer. The polymer may comprise one or more poreforming agents, cationic dye dyeable agents, coloring inhibitors, heatstabilizers, fluorescent brightening agents, matting agents, coloringagents, hygroscopic agents and inorganic fine particles as required aslong as the object of the present invention is not impaired.

It is preferred that the melt viscosity of the sea component of thesea-island type composite fibers composed of the above sea componentpolymer and the above island component polymer should be higher than themelt viscosity of the island component polymer at the time of meltspinning. The diameter of the island component must fall within therange of 10 to 1,000 nm. When the island component is not spherical, thediameter of a circumscribing circle is obtained. In the above sea-islandtype composite fibers, the sea-island conjugate weight ratio(sea:island) is preferably 40:60 to 5:95, particularly preferably 30:70to 10:90.

The sea-island type composite fibers may be easily produced, forexample, by the following process. That is, melt-spinning is carried outby using the above sea component polymer and the above island componentpolymer. As a spinneret used for melt-spinning, a spinneret havinghollow bottles or pores for forming the island components may be used.The discharged sea-island type composite fibers are solidified withcooling air and melt spun at a rate of preferably 400 to 6,000 m/min tobe taken up. The obtained undrawn yarn is preferably formed intocomposite fibers having desired strength, elongation and thermalcontraction characteristics through a separate drawing step.Alternatively, after the discharged sea-island type composite fibers aretaken up by a roller at a constant speed without being wound up and thensubjected to a drawing step, they are wound up.

Preferably, the sea-island type composite fibers (multifilament) thusobtained have a monofilament fineness of 0.5 to 10.0 dtex, 5 to 75filaments and a total fineness of 30 to 170 dtex. The boiling watershrinkage of the sea-island type composite fibers is preferably 5 to30%.

The above filament yarn may be fine fibers composed of composite fiberssuch as petal type composite fibers or side-by-side type compositefibers, or fine fibers obtained by ordinary spinning and drawing steps.

(fibers “B”)

Meanwhile, fibers “B” having a monofilament diameter larger than 10,000nm are prepared as required. The monofilament fineness of the fibers “B”is preferably not less than 0.1 dtex (more preferably 0.1 to 50 dtex).

The above fibers “B” are preferably highly shrinkable polyester having aboiling water shrinkage of not less than 10% (preferably 20 to 40%) orelastic yarn (polyurethane elastic yarn or polyether ester elasticyarn). To obtain the above high boiling water shrinkage, spinning anddrawing should be carried out in accordance with commonly used processesby using a copolyester. At this point, the main constituent monomers ofthe copolyester are terephthalic acid and ethylene glycol, and the thirdcomponent to be copolymerized with the main constituent monomers ispreferably selected from the group consisting of isophthalic acid,naphthalene dicarboxylic acid, adipic acid, sebacic acid, diethyleneglycol, polyethylene glycol, bisphenol A and bisphenol sulfone. Theabove copolyester is preferably a copolyester comprising terephthalicacid and isophthalic acid in a (terephthalic acid/isophthalic acid)molar ratio of 90/5 to 85/15 as acid components and ethylene glycol as aglycol component. A high boiling water shrinkage is obtained by usingthis copolyester.

(Weaving or Knitting of Cloth “a”)

Then, the cloth “a” is woven or knitted in accordance with a commonlyused method by using the above sea-island composite fibers andoptionally the fibers “B”. It is preferred that the above sea-islandtype composite fibers should be exposed to either one of the frontsurface and the rear surface of the cloth.

Although the sea-island type composite fibers and the fibers “B” may becontained in the cloth as combined filament yarn, the cloth (knitted orwoven fabric) is preferably woven or knitted by interweaving orinterknitting the above filament yarn A and the above filament B.

When not only the sea-island type composite fibers but also the abovefibers “B” are used, the total fineness ratio of the above sea-islandtype composite fibers to the filament yarn “B” is preferably 90:10 to20:80.

The above cloth may be woven cloth, knitted cloth or nonwoven cloth andis not particularly limited. The above cloth is not limited to aparticular texture. Examples of weft knit texture include plain stitch,rib stitch, interlock stitch, purl stitch, tuck stitch, float stitch,half cardigan stitch, lace stitch and plating stitch. Examples of warpknit texture include single Denbigh stitch, single atlas stitch, doublecord stitch, half stitch, half base stitch, satin stitch, half tricotstitch, fleeced stitch and jacquard stitch. Examples of weave textureinclude three foundation weaves such as plain weave, twill weave andsatin weave, derivative weave, half double weave such as warp backedweave and weft backed weave, and warp velvet. As a matter of course, thetexture is not limited to these. The number of layers may be one or twoor more.

(Treatment with Alkali Aqueous Solution)

Thereafter, when the above cloth is treated with an alkali aqueoussolution to dissolve and remove the sea component of the sea-island typecomposite fibers with the alkali aqueous solution, the sea-island typecomposite fibers become the fibers “A” having a monofilament diameter of10 to 10,000 nm, thereby obtaining the cloth “a” containing the fibers“A” having a monofilament diameter of 10 to 10,000 nm. At this point, asthe conditions of the treatment with the alkali aqueous solution, it isrecommended that a NaOH aqueous solution having a concentration of 3 to4% should be used to carry out the treatment at a temperature of 55 to65° C.

(dyeing)

Before and/or after the step of dissolving and removing with the alkaliaqueous solution, the cloth may be dyed. It may be calendared (heatpressurization) or embossed. It may be further subjected to raising,water-repellent processing and optionally processing for providing thefunction of an ultraviolet screening agent, antistatic agent,antibacterial agent, deodorant, insecticide, luminous agent,retroreflective agent or minus ion generator.

<Quilt Cover>

The quilt cover of the present invention may be composed of only thecloth “a” or both the cloth “a” and another cloth. For example, theabove cloth may be sewed or bonded (thermally or chemically bonded) tothe rear surface on a human side (surface in contact with the quilt)and/or the rear surface on an outer side (surface in contact with thequilt) of a commercially available quilt cover. Further, the above clothmay be sewed to a cutout part of the quilt cover or may be sewed toanother cloth as parts to produce a quilt cover. It is preferred thatthe above cloth “a” should be sewed or bonded to a position 0 to 50 cmaway from the end of the quilt cover. This distance is obtained bymeasuring the shortest distance between the end of the quilt cover andthe end of the cloth “a”.

Preferably, the part composed of the cloth “a” has a width of 5 to 100cm and a length of 50 to 200 cm. The number of the parts may be one ormore.

Preferably, when the quilt cover is opened, the above part is arrangedon the rear surface side of the quilt cover, and the area ratio of thepart to the rear surface is not less than 3% (preferably 3 to 40%) inorder to prevent the slippage of the quilt in the quilt cover.

The above area ratio is calculated from the following equation.

Area ratio=[total area of the parts/total surface area of rear surfaceof quilt cover]×100

The “total surface area of rear surface of quilt cover” is obtained bymeasuring the total surface area of the rear surface of the quilt coverwhile the quilt cover is opened as shown in FIG. 1. For example, whentwo parts measuring 10 cm×150 cm are formed in a quilt cover having awidth of 150 cm and a length of 210 cm, the area ratio is as follows.

Area ratio=[(10×150×2)/(150×210)×2]×100=4.76%

Since the quilt cover of the present invention includes the above cloth“a”, it has the effect of making difficult the slippage of a quilt inthe quilt cover without impairing the lightweight and softness of thequilt cover.

Preferably, the above cloth “a” has a friction resistance value of notless than 40 cN (preferably 40 to 50 cN).

The friction resistance value is a resistance value (cN) measured by thefollowing method. That is, the cloth “a” as a sample (7) is placed on aflat table as schematically shown in FIG. 2 in an environment having atemperature of 20° C. and a relative humidity of 65%. Then, a frictionresistance measurement head (6) for a quilt having a bottom surfacemeasuring 10 cm×8 cm, a height of 3 cm and a weight of 10 gr (9.8 cN) isplaced on the cloth “a”. A commercially available quilt is purchased,and side cloth (100% of polyester, plain weave) and inner cotton (100%of polyester) are cut to the above size and sewed together for the head(6). Then, the resistance value (cN) is measured when the head is pulledat a speed of 500 mm/min with a tensile tester.

EXAMPLES

The following examples and comparative examples are provided for thepurpose of further illustrating the present invention but are in no wayto be taken as limiting. Measurement items in these examples weremeasured by the following methods.

<Melt Viscosity>

After a polymer after drying was set in an orifice set to the meltingtemperature of an extruder at the time of spinning to be kept molten for5 minutes, it was extruded under a load of several levels to plotshearing speed and melt viscosity at each time. These plots weresmoothly interconnected to forma shearing speed-melt viscosity curve soas to find a melt viscosity at a shearing speed of 1,000 sec⁻¹.

<Dissolution Speed>

Yarn having sea and island components was taken up through a 0.3 φ−0.6L×24H spinneret at a spinning rate of 1,000 to 2,000 m/min and drawn toensure that the degree of residual elongation became 30 to 60% so as toproduce a multifilament having a fineness of 84 dtex/24 fil. The weightreduction rate was calculated from the dissolution time and thedissolution amount based on a bath ratio of 100 at a temperature fordissolution with each solvent.

<Monofilament Diameter>

After the cloth was photographed with an electron microscope, themonofilament diameter was measured 5 times to obtain an average value.

<Friction Resistance Value>

A friction resistance value (cN) was measured by the following method asan alternative characteristic for friction force. That is, asschematically shown in FIG. 2, cloth as a sample (7) was placed on aflat table in an environment having a temperature of 20° C. and arelative humidity of 65%. Then, a friction resistance measurement head(6) for a quilt having a bottom surface measuring 10 cm×8 cm, a heightof 3 cm and a weight of 10 gr (9.8 cN) was placed on the cloth. Acommercially available quilt was purchased, and side cloth (100% ofpolyester, plain weave) and inner cotton (100% of polyester) were cut tothe above size and sewed together for the head (6). Then, the resistancevalue (cN) was measured when the head (6) was pulled at a speed of 500mm/min with a tensile tester.

<Antislip Property>

A use test was made on an antislip quilt cover obtained in Example 1 anda quilt cover obtained in Comparative Example 1 by 20 testers for 1month. The slippage of a quilt in the quilt cover was evaluated based onthe following three grades in a movement when sleeping in a daily quilt(grade 3: rarely slip, grade 2: may slip by a large movement, class 1:may slip by a small movement).

Example 1

Sea-island composite undrawn fibers ((sea/island) dissolution speedratio=230) having a sea:island ratio of 30:70 and 836 islands obtainedby using polyethylene terephthalate (melt viscosity at 280° C. of 1,200poise, content of matting agent: 0 wt %) as an island component andpolyethylene terephthalate (melt viscosity at 28° C. of 1,750 poise)obtained by copolymerizing 6 mol % of 5-sodium sulfoisophthalic acid and6 wt % of polyethylene glycol having a number average molecular weightof 4,000 as a sea component were melt spun at a spinning temperature of280° C. and a spinning rate of 1,500 m/min and taken up.

The obtained undrawn yarn was drawn with a roller at a draw temperatureof 80° C. and a draw ratio of 2.5 times and heat set at 150° C. to betaken up. The obtained sea-island type composite fibers (drawn yarn A-1for the fibers “A”) had a fineness of 56 dtex/10 fil, and when the crosssection of each fiber was observed with a transmission electronmicroscope TEM, the islands were circular and had a diameter of 710 nm.

Meanwhile, polyester highly shrinkable yarn (total fineness of 33dtex/12 fil, manufactured by Teijin Limited) A-2 and the drawn yarn A-1were interlaced to prepare combined filament yarn having a fineness of90 dtex/22 fil. Commercially available polyester false-twisted crimpedyarn having a fineness of 75 dtex/36 fil (monofilament diameter of12,600 nm) was prepared as the fibers “B”.

Then, circular knitted cloth having a mesh texture was obtained by usingthese yarns and a 28 G 33-inch circular knitting machine (LPJ25manufactured by Fukuhara Works Ltd.). Thereafter, to remove the seacomponent of the sea-island type composite drawn yarn of the obtainedknitted cloth, the amount of an alkali was reduced by 30% with a 2.5%NaOH aqueous solution at 70° C. Then, high-pressure dyeing was carriedout at 130° C. and dry-heat setting was carried out at 170° C. as finalsetting to obtain the cloth “a”.

In the obtained cloth “a”, the monofilament diameter of the drawn yarnA-1 for the fibers “A” (39 dtex/8360 fil) was 710 nm. The frictionresistance value of the front side surface of the cloth “a” was 76 cNwhich is more than twice that of the cloth (24 cN) of ComparativeExample 1.

The cloth “a” as antislip cloth was sewed to the rear surface on thehuman side of a commercially available quilt cover (plain woven fabrichaving side cloth made of 100% of polyester, inner cotton made of 100%of polyester fibers, size of 150 cm×210 cm) to produce an antislip quiltso as to carry out a use test. As a result, the obtained quilt cover wassuperior in antislip property to that of Comparative Example 1. Thecloth “a” was sewed to the inner surface on the human side of the quiltcover at the time of sleeping and positioned along the both sides of thequilt. The area ratio of the part composed of the cloth “a” was 4.7%.

The cloth “a” was attached to the rear surface on the human side (quiltside) at the time of sleeping, had a length which was the same as thewidth of one side of the quilt cover and a width of 10 cm and placed atpositions 30 cm away from the upper end and the lower end of the quiltcover.

A commercially available quilt (side cloth: 100% of polyester fibers,inner cotton: 100% of polyester fibers) was inserted into the quiltcover and tapes in the quilt cover for fixing the quilt were not used toevaluate antislip property by using the quilt at the time of sleeping.As a result, 16 testers evaluated the antislip property as grade 3(rarely slip), 3 testers evaluated it as grade 2 (may slip by a largemovement) and 1 tester evaluated it as grade 1 (may slip by a smallmovement). 16 testers out of 20 did not feel the slippage of the quiltin the cover and could sleep well.

After the quilt cover was washed, its functionality remainedsatisfactory, use of the tapes for fixing the quilt was not necessary,and the work efficiency of attaching and detaching the quilt cover wasexcellent.

Comparative Example 1

Evaluation was made in the same manner as in Example 1 except that thecloth “a” was not sewed to a quilt cover. The friction resistance was 24cN. 2 testers evaluated antislip property as grade 3 (rarely slip), 5testers evaluated it as grade 2 (may slip by a large movement), and 12testers evaluated it as grade 1 (may slip by a small movement). A quiltslipped a lot while sleeping so that testers felt uncomfortable andcould not sleep well.

Example 2

The procedure of Example 1 was repeated except that the width of thecloth “a” was changed to 30 cm and the cloth “a” was placed at the endsof the quilt cover. The testers did not feel the slippage of the quiltin the quilt cover and could sleep comfortably.

Example 3

The procedure of Example 1 was repeated except that the width of thecloth “a” was changed to 25 cm and the cloth “a” was placed at the endsof the quilt cover. The testers did not feel the slippage of the quiltin the quilt cover and could sleep comfortably.

Example 4

The procedure of Example 1 was repeated except that the width of thecloth “a” was changed to 20 cm and the cloth “a” was placed at the endsof the quilt cover. The testers did not feel the slippage of the quiltin the quilt cover and could sleep comfortably.

Example 5

The procedure of Example 1 was repeated except that the width of thecloth “a” was changed to 20 cm and the cloth “a” was placed at positions15 cm away from the upper and lower ends of the quilt cover. The testersdid not feel the slippage of the quilt in the quilt cover and couldsleep comfortably.

Example 6

The procedure of Example 1 was repeated except that the width of thecloth “a” was changed to 15 cm and the cloth “a” was placed at positions15 cm away from the upper and lower ends of the quilt cover. The testersdid not feel the slippage of the quilt in the quilt cover and couldsleep comfortably.

Effect of the Invention

The quilt cover of the present invention makes difficult the slippage ofa quilt in the quilt cover without impairing the lightweight andsoftness of the quilt cover.

INDUSTRIAL APPLICABILITY

According to the present invention, there is provided a quilt coverwhich makes difficult the slippage of a quilt in the quilt cover withoutimpairing the lightweight and softness of the quilt cover and which isof great industrial value.

1. A quilt cover having a part composed of cloth “a” containing fibers“A” having a monofilament diameter of 10 to 10,000 nm.
 2. The quiltcover according to claim 1, wherein when the quilt cover is opened, thepart is arranged on the rear side of the quilt cover and has an arearatio to the rear surface of not less than 3%.
 3. The quilt coveraccording to claim 2, wherein the part has an area ratio to the rearsurface of 3 to 40%.
 4. The quilt cover according to claim 1, whereinthe fibers “A” have a monofilament diameter of 10 to 1,000 nm.
 5. Thequilt cover according to claim 1, wherein the part has a width of 5 to100 cm and a length of 50 to 200 cm.
 6. The quilt cover according toclaim 1, wherein the part is sewed or bonded to the quilt cover.
 7. Thequilt cover according to claim 6, wherein the part is sewed or bonded tothe rear surface on a human side and/or the rear surface on an outerside of the quilt cover.
 8. The quilt cover according to claim 6,wherein the part is sewed or bonded to a position 0 to 50 cm away fromthe end of the quilt cover.
 9. The quilt cover according to claim 6,wherein the part is sewed or bonded to a plurality of sites.
 10. Thequilt cover according to claim 1, wherein the fibers “A” are longfibers, each having not less than 500 filaments.
 11. The quilt coveraccording to claim 1, wherein the fibers “A” are yarn obtained bydissolving and removing the sea component of sea-island type compositefibers composed of a sea component and an island component.
 12. Thequilt cover according to claim 1, wherein the fibers “A” are made ofpolyester.
 13. The quilt cover according to claim 1, wherein the cloth“a” further contains fibers “B” having a monofilament diameter largerthan 10,000 nm.
 14. The quilt cover according to claim 1, wherein thecloth “a” is woven, knitted or nonwoven cloth.